package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

public class RefreshTokenInterceptor implements HandlerInterceptor {


    private StringRedisTemplate stringRedisTemplate;

    public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate){
        this.stringRedisTemplate = stringRedisTemplate;
    }


    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {


        //1.获取请求中顶点token
        String token = request.getHeader("authorization");
        if(StrUtil.isBlank(token)){
            //不存在，拦截；返回401状态码
//            response.setStatus(401);
//            return false;
            return true;
        }

        //基于token获取redis中的用户
        String key = RedisConstants.LOGIN_USER_KEY+token;
        Map<Object,Object>userMap = stringRedisTemplate.opsForHash().entries(key);
        //判断用户是否存在
        if(userMap.isEmpty() ){
            return true;
        }

        //5.将查询到的Hash暑假转为UserDTO对象
        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap,new UserDTO(),false);
        //6.存在，保存用户信息到ThreadLocal
        UserHolder.saveUser(userDTO);

        stringRedisTemplate.expire(key,RedisConstants.LOGIN_USER_TTL, TimeUnit.MINUTES);




        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //移除用户
        UserHolder.removeUser();
    }
}
